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A pencil ( ) is a writing or drawing implement with a solid pigment core in a protective casing that reduces the risk of core breakage, and keeps it from marking the user's hand.

Pencils create marks by physical abrasion, leaving a trail of solid core material that adheres to a sheet of paper or other surface. They are distinct from pens, which dispense liquid or gel ink onto the marked surface.

Most pencil cores are made of graphite powder mixed with a clay binder. Graphite pencils (traditionally known as "lead pencils") produce grey or black marks that are easily erased, but otherwise resistant to moisture, most chemicals, ultraviolet radiation and natural aging. Other types of pencil cores, such as those of charcoal, are mainly used for drawing and sketching. Coloured pencils are sometimes used by teachers or editors to correct submitted texts, but are typically regarded as art supplies, especially those with cores made from wax-based binders that tend to smear when erasers are applied to them. Grease pencils have a softer, oily core that can leave marks on smooth surfaces such as glass or porcelain.

The most common pencil casing is thin wood, usually hexagonal in section but sometimes cylindrical or triangular, permanently bonded to the core. Casings may be of other materials, such as plastic or paper. To use the pencil, the casing must be carved or peeled off to expose the working end of the core as a sharp point. Mechanical pencils have more elaborate casings which are not bonded to the core; instead, they support separate, mobile pigment cores that can be extended or retracted (usually through the casing's tip) as needed. These casings can be reloaded with new cores (usually graphite) as the previous ones are exhausted.

Han unification is an effort by the authors of Unicode and the Universal Character Set to map multiple character sets of the so-called CJK languages into a single set of unified characters. Han characters are a common feature of written Chinese (hanzi), Japanese (kanji), and Korean (hanja).

Modern Chinese, Japanese and Korean typefaces typically use regional or historical variants of a given Han character. In the formulation of Unicode, an attempt was made to unify these variants by considering them different glyphs representing the same "grapheme", or orthographic unit, hence, "Han unification", with the resulting character repertoire sometimes contracted to Unihan.

Unihan can also refer to the Unihan Database maintained by the Unicode Consortium, which provides information about all of the unified Han characters encoded in the Unicode Standard, including mappings to various national and industry standards, indices into standard dictionaries, encoded variants, pronunciations in various languages, and an English definition. The database is available to the public as text files and via an interactive website. The latter also includes representative glyphs and definitions for compound words drawn from the free Japanese EDICT and Chinese CEDICT dictionary projects (which are provided for convenience and are not a formal part of the Unicode Standard).

Sütterlinschrift (German pronunciation: [ˈzʏtɐliːnˌʃʁɪft], "Sütterlin script") is the last widely used form of Kurrent, the historical form of German handwriting that evolved alongside German blackletter (most notably Fraktur) typefaces. Graphic artist Ludwig Sütterlin was commissioned by the Prussian Ministry of Science, Art and Culture (Preußisches Ministerium für Wissenschaft, Kunst und Volksbildung) to create a modern handwriting script in 1911. His handwriting scheme gradually replaced the older cursive scripts that had developed in the 16th century at the same time that letters in books had developed into Fraktur. The name Sütterlin is nowadays often used to refer to all varieties of old German handwriting, although only this specific script was taught in all German schools from 1915 to 1941.

Tifinagh (Tuareg Berber language: ⵜⴼⵏⵗ or ⵜⴼⵉⵏⵗ, Berber pronunciation: [tifinaɣ]) or Tuareg Tifinagh is an abjad script used to write the Tuareg Berber language by the Tuareg Berbers of the Sahara desert in southern Algeria, northeastern Mali, northern Niger and northern Burkina Faso. Tuareg Tifinagh is descended from the ancient Libyco-Berber alphabet.

Neo-Tifinagh (ⵜⵉⴼⵉⵏⴰⵖ) is an alphabet that was created in northern Algeria around the 1980s as a modified version of the traditional Tuareg Tifinagh. Neo-Tifinagh has been used since the 1980s by Algerians and later by Moroccans for the symbolic promotion of the Berber language, while mainly using the Berber Latin alphabet in most publications. Neo-Tifinagh is often simply called "Tifinagh" by non-academics in Berber countries and in the media, thus confusing it with the traditional and distinct "Tuareg Tifinagh" which is the actual "Tifinagh".

There are significant differences between the ancient Libyco-Berber script and the Tuareg Tifinagh script, but also many similarities. Many letters from the ancient Libyco-Berber script do not exist (anymore) in the Tuareg Tifinagh, while other letters evolved into a different pronunciation in the current Tuareg Tifinagh script.

There are also significant differences between the Tuareg Tifinagh script and the newly created Neo-Tifinagh alphabet. Many Tuareg Tifinagh letters are discarded in Neo-Tifinagh, and other ones are modified in form or in pronunciation. The Neo-Tifinagh alphabet also features invented vowels and other letters not found in Tuareg Tifinagh. About half of the letters in the Neo-Tifinagh alphabet were either completely invented (ⵥ,ⴻ,ⵕ,ⵄ,ⵃ,ⵞ,ⵯ,ⵇ,ⵚ,ⴽ,ⵅ,ⴿ,ⵖ,ⵠ), modified in form (ⴰ,ⵓ,ⴼ,ⵁ,ⵍ) or repurposed for a different pronunciation (ⵀ,ⵡ,ⴵ). All traditional Tuareg Tifinagh letters that consist entirely of dots (ⵗ,ⵈ,ⴾ,ⵆ,ⵘ,ⵂ) were discarded by the creators of Neo-Tifinagh and were replaced by newly invented ones. Tuareg people in the Sahara desert continue to use these dotted letters as an integral part of their traditional Tuareg Tifinagh script, thus deliberately distinguishing themselves and their writings from the northern Berbers of Morocco and northern Algeria who use the Neo-Tifinagh alphabet or the Berber Latin alphabet in writing the Berber language.

The ancient Libyco-Berber script (or the Libyc script) was used by the ancient northern Berbers known as Libyco-Berbers, also known as Libyc people, Numidians, Afri and Mauretanians who inhabited the northern parts of Morocco, Algeria, Tunisia and Libya as well as the Canary Islands west of Morocco.

From the ancient Libyco-Berber script came the Tifinagh script (Tuareg Tifinagh) through a long evolution. And then from the Tifinagh script was the modern Neo-Tifinagh alphabet created.

The name Tifinagh is stylized as Tifinaɣ in the Berber Latin alphabet, and in the Neo-Tifinagh alphabet it is written as ⵜⵉⴼⵉⵏⴰⵖ, while in the Tuareg people's traditional Tifinagh it's written as ⵜⴼⵉⵏⵗ or ⵜⴼⵏⵗ.

Neo-Tifinagh, which was created in northern Algeria around the 1980s, is a heavily modified version of the traditional Tuareg Tifinagh script. This newly created Neo-Tifinagh script spread from Algeria to Morocco and was rebranded by the Moroccan Royal Institute of the Amazigh Culture (IRCAM) as "Tifinaghe-Ircam" or simply "Tifinaghe", and is used in a small part of Moroccan and some Libyan elementary schools to teach the Berber language to children, as well as in a number of literary publications and some websites and media. In Algeria, most Berber language education programs in elementary schools, high schools and university use the Berber Latin alphabet, while a small number of schools use Neo-Tifinagh, Tuareg Tifinagh in the south, or even the Arabic alphabet.

The word tifinagh is thought by some scholars to be a Berberized feminine plural cognate or adaptation of the Latin word "Punicus", (meaning "Punic" or "Phoenician") through the Berber feminine prefix ti- and Latin Punicus; thus tifinagh could possibly mean "the Phoenician (letters)" or "the Punic letters". Others support an etymology involving the Tuareg verb efnegh, meaning to write. However, the Tuareg verb efnegh is probably derived from the noun "Tifinagh" because all the northern Berbers of Morocco, northern Algeria, Tunisia and northern Libya have a different (and probably older) verb "ari, aru, ara" which means "to write".